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  • 1
    Electronic Resource
    Electronic Resource
    Axillary shoot proliferation and growth of Populus deltoides shoot cultures (1990)
    Springer
    Plant cell reports 9 (1990), S. 165-167 
    Details
    ISSN: 1432-203X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Shoot cultures of four genotypes of Populus deltoides Bartr. ex Marsh. were established from adventitious shoots regenerated from internodal stem explants. Stable shoot cultures for all four genotypes were maintained in a continuous culture regime for over one year. The stable shoot cultures were used as explants to investigate the effects of zeatin concentration and genotype on axillary shoot production and growth. The concentration of zeatin significantly affected the production of axillary shoots, with 1.0 mgL−1 zeatin producing the greatest number of shoots (31.0 shoots per culture vessel) while 0.25 mgL−1 zeatin produced the greatest growth (5.9 mg per axillary shoot) when measured by dry weight accumulation per shoot. Genotypic differences were significant in the production and growth of axillary shoots.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00232096
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    In vitro shoot regeneration of Populus deltoides: effect of cytokinin and genotype (1989)
    Springer
    Plant cell reports 8 (1989), S. 459-462 
    Details
    ISSN: 1432-203X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Treatment differences were observed in the in vitro adventitious shoot regeneration response from internodal explants of three genotypes of Populus deltoides cultured on media supplemented with five concentrations each of the cytokinins 6-benzyladenine, 2-isopentyladenine, and zeatin. For each of the three genotypes, the greatest number of shoots were consistently regenerated on media containing the cytokinin zeatin. Tissue necrosis resulted when explants from any of the three genotypes were cultured on media supplemented with 6-benzyladenine. A zeatin concentration by genotype interaction was also observed. Genotypic differences in shoot regeneration were observed for 16 genotypes of Populus deltoides when cultured on medium supplemented with 0.5 mgL−1 zeatin. Six genotypes were highly recalcitrant and failed to regenerate shoots. The percent of explants regenerating was greater than 50% for four genotypes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00269048
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Genetic variation in the diatomFragilaria capucina (Fragilariaceae) along a latitudinal gradient across North America (1997)
    Springer
    Plant systematics and evolution 204 (1997), S. 99-108 
    Details
    ISSN: 1615-6110
    Keywords: Bacillariophyceae ; Fragilaria capucina ; Phytoplankton ; polymerase chain reaction ; population genetics ; random amplified polymorphic DNA
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Genetic variation in 126 clones of the planktonic diatom,Fragilaria capucina, collected from seven lakes from Manitoba to Texas, was determined by RAPD analysis. Five primers yielded 48 scorable RAPD fragments in 123 unique combinations. Patterns of genetic variation were analysed by cluster analysis, which showed that most clones grouped together according to the site from which they were collected. This pattern in genetic variation may be a result of the geographically disjunct nature of these populations and/or the different environmental conditions, especially temperature, in the different lakes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00982534
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